645136411532 has 24 divisors (see below), whose sum is σ = 1133807554320. Its totient is φ = 321192924480.

The previous prime is 645136411459. The next prime is 645136411541. The reversal of 645136411532 is 235114631546.

It is a self number, because there is not a number n which added to its sum of digits gives 645136411532.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1506194 + ... + 1886502.

It is an arithmetic number, because the mean of its divisors is an integer number (47241981430).

Almost surely, 2^645136411532 is an apocalyptic number.

It is an amenable number.

645136411532 is a deficient number, since it is larger than the sum of its proper divisors (488671142788).

645136411532 is a wasteful number, since it uses less digits than its factorization.

645136411532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382121 (or 382119 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The spelling of 645136411532 in words is "six hundred forty-five billion, one hundred thirty-six million, four hundred eleven thousand, five hundred thirty-two".